In Reply to: I'm done the Altecs - how's the tube x-over coming? posted by billfort on January 14, 2003 at 08:23:27:
Here's a link to the thread that contains the model of the crossover circuit, in case you're interested. You can download the model and simulate the circuit to see its response curves. I suggest that you model the circuit while modifying values for R15, R16, R17 and C10 so you can see their effects. I'd also highly recommend that you analyze the circuit as it is without these components. I think you'll find it very interesting.You will find that by changing values of R15, R16, R17 and C10, you can modify the slope of the HF section. You can generate response curves having negative slope, zero slope or positive slope. What I mean is that the circuit can be configured to give falling, flat or rising response. You can also provide a shelved response, and tailor the bandwidth of the flat area prior to augmentation. And for the LF section, you can set the amount of boost near the crossover frequency by changing the filter damping resistor. My recommended values set this circuit flat.
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